opBNB tooling

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MetaMask

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web3.js

1. Install web3.js.
2. Connect over HTTP.

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HTTP

const {Web3} = require('web3');

const web3 = new Web3(new Web3.providers.HttpProvider('YOUR_CHAINSTACK_ENDPOINT'));

web3.eth.getBlockNumber().then(console.log);

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web3.py

1. Install web3.py.
2. Connect over HTTP. See also EVM node connection: HTTP vs WebSocket.

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HTTP

from web3 import Web3

web3 = Web3(Web3.HTTPProvider('YOUR_CHAINSTACK_ENDPOINT'))
print(web3.eth.block_number)

• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password
• HOSTNAME — your node HTTPS endpoint hostname
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)

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ethers.js

1. Install ethers.js.
2. Connect over HTTP. See also EVM node connection: HTTP vs WebSocket.

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HTTP

const { ethers } = require("ethers");

var urlInfo = {
    url: 'YOUR_CHAINSTACK_ENDPOINT'
};
var provider = new ethers.JsonRpcProvider(urlInfo.url, NETWORK_ID);

provider.getBlockNumber().then(console.log);

• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)
• NETWORK_ID — opBNB network ID:
  • opBNB Mainnet: 204

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Hardhat

1. Install Hardhat and create a project.
2. Create a new environment in hardhat.config.js:
   Javascript

   Copy

   require("@nomiclabs/hardhat-waffle");
   ...
   module.exports = {
     solidity: "0.7.3",
     networks: {
       chainstack: {
           url: "YOUR_CHAINSTACK_ENDPOINT",
           accounts: ["YOUR_PRIVATE_KEY"]
       },
     }
   };
   

   where
   • YOUR_CHAINSTACK_ENDPOINT — your node HTTPS or WSS endpoint protected either with the key or password. See node access details.
   • YOUR_PRIVATE_KEY — the private key of the account that you use to deploy the contract
3. Run npx hardhat run scripts/deploy.js --network chainstack and Hardhat will deploy using Chainstack.

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Remix IDE

1. Get MetaMask and set it to interact through a Chainstack node. See Interacting through MetaMask.
2. In Remix IDE, navigate to the Deploy tab. Select Injected Provider - MetaMask in Environment.

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web3.php

1. Install web3.php.
2. Connect over HTTP:
   Php

   Copy

   <?php
   
   require_once "vendor/autoload.php";
   
   use Web3\Web3;
   use Web3\Providers\HttpProvider;
   use Web3\RequestManagers\HttpRequestManager;
   
   $web3 = new Web3(new HttpProvider(new HttpRequestManager("YOUR_CHAINSTACK_ENDPOINT", 5)));
   ?>
   

   where YOUR_CHAINSTACK_ENDPOINT is your node HTTPS endpoint protected either with the key or password
3. Use JSON-RPC methods to interact with the node. Example to get the latest block number:
   Php

   Copy

   <?php
   
   require_once "vendor/autoload.php";
   
   use Web3\Web3;
   use Web3\Providers\HttpProvider;
   use Web3\RequestManagers\HttpRequestManager;
   
   $web3 = new Web3(new HttpProvider(new HttpRequestManager("YOUR_CHAINSTACK_ENDPOINT", 5)));
   
   $eth = $web3->eth;
   
   $eth->blockNumber(function ($err, $data) {
        print "$data \n";
   });
   ?>
   

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Foundry

1. Install Foundry.
2. Use --rpc-url to run the operation through your Chainstack node.

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Forge

forge create CONTRACT_NAME --contracts CONTRACT_PATH --private-key YOUR_PRIVATE_KEY --rpc-url YOUR_CHAINSTACK_ENDPOINT

• CONTRACT_NAME — name of the contract in the Solidity source code
• CONTRACT_PATH — path to your smart contract
• YOUR_PRIVATE_KEY — the private key to your funded account that you will use to deploy the contract
• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password

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Cast

cast block-number --rpc-url YOUR_CHAINSTACK_ENDPOINT